Nitinol Metal Powder – Property and Preparation

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What are the properties of nitinol metallic powder?

Nitinol Metal Powder (Niti alloy powder) is an alloy with a memory function. Shape memory alloys (SMA, for short) can eliminate their deformation completely at a lower heat and restore it after heating. The alloy with “memory’ effect is the material that retains its original shape.

Many successful applications of nitinol metallic powder have been made in the aerospace industry. Memory alloys can be used for the antenna of the artificial satellite. Fold the parabolic satellite antenna into the body of the artificial satellite before it is launched. It is only necessary to heat the satellite after the rocket launches to place it in a specific orbit. The “memory function” of the folded antenna allows it to unfold and regain its original shape.

Shape memory alloys have many applications in aerospace, electronics and machinery, biomedicine, bridge building, automobile industry and everyday life.

What is the best way to prepare nitinol metallic powder?

The following raw materials are used for the PREP process to produce spherical metal powder nitinol.
The steps of preparation for the PREP method for the preparation of spherical Nitinol Metal Powder are: the raw materials must be weighed and sized according to the experimental plan and then poured directly into the cemented carbide tank ball milling for wet-grinding. The ball milling period is 24 hours. The obtained pellets, after the ball-milling, are vacuum dried for 50 min at a temperature of 38deg C. They are then added as an forming agent to the granulation. The powdered material is placed into a single-column press to be compressed, then in an integrated dewaxing-low-pressure sintering oven for sintering.
After batching and ball milling the NiTi bars, followed by drying, granulation forming, and then sintering was a PREP method that produced spherical metal powder with excellent mechanical properties. The martensite transformation temperatures decrease with decreasing particle sizes of nitinol metallic powders. The PREP method produces spherical powders of nitinol, which are improved in terms of hardness, density and bending strength.

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